Cutting mechanism.



W. METOALFE.

G UTTING MEGHANISM. APPLICATION 'FAILED AUG. 5, 190mg Patented Dec. 7, 1909.

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UTTING MEGHANISM.

ABYLIOATION FILED AUG. s. 1907.

942,209, Patented Dec. 7, 1909.

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WILLIAM S. METCALFE, 0F WORCESTER, MASSACHUSETTS.

CUTTING MEGHANISM.

Specification of Letters Patent.

Patented Dec. 7, 1909.

Application filed August 5, 1907. Serial No. 387,059.

To all whom it may concern:

Be it known that I, WILLIAM S. METCALFE, a citizen of the United States, residing at lVorcester, in the county of Worcester and Commonwealth of Massachusetts, have in' vented a new and useful Improvement in Cutting Mechanisms, of which the following is a specification, accompanied by drawings, forming a part of the same, in which- Figure 1 is a perspective view of a portion of a machine for making envelops, having a cutting mechanism embodying my invention. Fig. 2 is a rear elevation of my improved cutting mechanism. Fig. 3 is a plan view with a portion of the cutting cylinder removed. Fig. 4 represents the reverse side of the pivoted latch 27 from that shown in Figs. 1 and 2.

Similar reference figures refer to similar parts in the different views.

My present invention relates particularly to certain improvements in that form of cutting mechanism which was shown and described in United States Letters Patent No. 738,380, granted to James West, assigner to Security Paper Specialty Company, September 8, 1903, and it has for its object to provide a mechanism for removing the severed edges as they are cut from the sheet material so they will not form an impediment to the operation of the cutting mechanism, and I accomplish this object by the construction and arrangement of parts as hereinafter described and pointed out in the annexed claims.

The cutting mechanism to which my invention relates is especially designed to form an irregular contour upon one or both edges of a continuous strip of thin sheet material, such for example, as paper, which is thereby adapted to be folded to form an envelop, paper bag, or the like. This is accomplished by passing the sheet material around a cutting cylinder, the ends of which are provided with a corner or edge that is adapted to cut, and has a form or contour corresponding with the desired edge ofthe sheet material, and the cutting is accomplished by pressing the sheet material against the cutting edge of the cylinder by means of a roller, preferably of hardened steel, which extends diagonally across each corner or cutting edge of the cylinder, as described in the aforesaid patent to Vest, No. 738,380. As the sheet lmaterial passes around the cutting cylinder,

it is pinched between the hardened roll and the cutting edge of the cylinder, causing narrow strips to be removed from the edges of the sheet material as determined by the contour of the ends of the cutting cylinder.

Referring to Fig. l of the drawings 1 denotes the cutting cylinder carried upon a revolving shaft 2, and 3 is a strip of sheet material which is wrapped around a portion of the cutting cylinder 1. Extending diagonally across the corners of the cutting cylinder 1 are hardened rolls 4, 4, turning loosely upon spindles 5, 5, which are pivotally held at one end in stems or brackets 6. To the free ends of the spindles 5 springs 7, 7, are applied to produce sutlicient pressure of the rolls against the sheet material as it passes over the cutting cylinder to cause the material to be severed, in order to produce the desired outline or contour upon the edges of the sheet material. In the present instance narrow strips are severed at regular intervals from the sheet material, forming recesses in its edges as shown at 8, 8, Fig. 1. Two of the strips partially severed from the edges of the sheet material are shown in Fig. 1 at 9, 9. i

It is the object of my present invention to provide means for withdrawing the severed strips 9, 9, entirely away from the cutting mechanism, as they are being severed from the edges of the sheet material, and I accomplish this result by providing rolls 10, 10, attached to rotating spindles 11, and running in contact with the hardened pressure rolls 4. The pressure rolls 4 are rotated by their frictional contact with the sheet material 3 las it is pressed against the cutting corners of the cylinder 1 by means of the springs 7 7 and the rolls 10 are independently driven in any convenient manner, in the present instance by means of a belt connection with a revolving countershaft 12, and preferably at a peripheral speed slightly in excess of the pressure rolls 4.

As the strips 9 are severed from the edge of the sheet material they naturally fall by gravity across the top of the rolls 4 and 10, as shown in Fig. 1, and are tucked between the rolls by means of a thin narrow tucking blade 13, to which a four-motion movement is imparted by means of actuating mechanism as hereinafter described.

The tucking blade 13 is attached to the upper end of an angular arm 14, provided at its opposite end with a barrel 15 pivoted upon a spindle 16, which is held in the ends of radial arms 17, 17, projecting from a barrel 18, capable of a rocking motion upon a spindle 19, held in a bracket 20 attached to the framework of the machine. The barrel 18 is also provided with a radial arm 21 having a pivotal connection at its free end with a block 22 which is connected by a link 23 with an eccentric strap 24 inclosing an eccentric 25 which is carried upon the shaft 2. As the eccentric 25 rotates, a rocking motion is imparted to the barrel 18, causing a forward and backward movement to be given to the arm 14. Attached to the framework of the machine is a bracket 26, upon which is pivoted a latch 27 having its free end 28 wedge shaped and resting upon the bracket 26.

Upon the side of the latch 27 nearest the arm 14 is a projecting rib 29. The arm 14 is provided with a pin 30 which slides over the upper surface of the rib 29 as the arm 14 is moved toward the cutting cylinder, causing the tucking blade 13 to pass over the end of the severed strip 9. As the pin 30 leaves the rib 29, the arm 14 and tucking blade 13 is depressed by means of a spring 31 which draws the tucking blade against the upper surface of the severed strip 9 and forces it between the rolls 4 and 10. As the arm 14 is retracted, the pin 30 passes beneath the rib 29, causing the latch 27 to be lifted and, as the pin 30 clears the latch, the latter falls into its normal position at rest upon the bracket 26, so that at the next forward movement of the arm 14 the tucking blade is carried forward above the rolls 4 and 10. During the backward or reverse movement of the arm 14 the pin 30 slides upon the incline 32 formed on the bracket 26. Four motions are therefore imparted to the tucking blade, as follows: It is carried forward, when in a raised position, by the rocking of the barrel 18 actuated by the eccentric 25, and the blade is held in its raised position by means of the pin 30 riding upon the rib 29 until the limit of the rib is reached, when the blade 13 is depressed by the action of the spring 31. It is then retracted or moved back by the action of the eccentric 25 and during its backward movement the arm is raised by means of the pin 30 riding up the inclined surface 32. This four-motion movement of the tucking blade 13 causes the severed strip to be forced between the rolls 4 and 1() into position to be seized by the rolls and moved downward as fast as it is severed from the strip of sheet material 3. A suction pipe 33 is provided with branches 34 which terminate in open funnel shaped mouths 35 immediately beneath the rolls 4 and 10, so that the severed strip 9 after it has passed between the rolls is immediately removed through the suction pipe 33. The suction mechanism, however, may be omitted if desired, allowing` the severed strips 9 to be delivered into receptacles placed upon the floor beneath the rolls 4 and 10.

I claim,

1. In a cutting mechanism, the combination with means for severing a strip from sheet material, comprising a pressing roll, of a second roll arranged to coperate with said pressing roll to carry the severed strip away from the cutting mechanism.

2. In a cutting mechanism, the combination with means for severing a strip from sheet material, comprising a pressing roll, of a second roll arranged to coperate with said pressing roll to carry the severed strip away from the cutting mechanism, and means for guiding the severed strip between said pressing roll and said coperating roll.

3. A cutting mechanism for severing` lateral strips from a continuous sheet, provided with a cutting cylinder, a pair of rolls in front of said cutting cylinder, arranged to receive upon their upper surface the severed strip as it falls from said continuous sheet, a blade arranged to insert said strip between said rolls, and means for actuating said blade.

4. A cutting mechanism for severing strips from a continuous sheet, provided with a severing mechanism, a pair of rolls in position to receive the strip as it is severed from said continuous sheet, a blade for inserting the strip between said rolls, a movable arm carrying said blade, and mea-ns for actuating said movable arm.

5. The combination with a cutting mechanism for severinga strip from sheet matcrial, of a pair of rolls for removing the severed strip, means for separately rotating one of said pair of rolls at a circumferential speed greater than the other of said rolls, and means for guiding the severed strip into contact with said faster roll.

6. In a cutting mechanism for severing strips from sheet material, the mechanism for removing the severed strips, consisting of a pair of rolls in position to receive the strips as they fall from the severing` mechanism, and a suction pipe arranged to receive the severed strips from said pair of rolls.

7. A cutting mechanism for severing strips from sheet material, having a sev` ering mechanism, a pair of rolls in position to receive the strip as it is severed, a blade for inserting the severed strip between said rolls, and means for imparting in succession forward, downward, backward and upward movements to said blade.

8. In a cutting mechanism of the class sheet material, and means for inserting the described, the combination With a roll havstrip between said pair of rolls. ing cutting corners, a hardened roll runnin against said cutting corners, a roll havin' WILLIAM S' METCALFE 5 a yielding surface running in Contact with Witnesses:

said hardened roll and forming a pair of PENELOPE COMBERBACH, rolls for the removal of the severed strip of RUFUS B. FOWLER. 

